文献类型：期刊文献

英文题名：Effect of isopropanol aging of Zr(OH)4 on n-hexane isomerization over Pt-SO42-/Al2O3-ZrO 2

作者：Yu, G.X.[1,2]; Zhou, X.L.[2]; Liu, F.[2]; Li, C.L.[2]; Chen, L.F.[3]; Wang, J.A.[3]

机构：[1] School of Chemistry and Environmental Engineering, Jianghan University, Wuhan, 430056, China; [2] School of Chemical Engineering, East China University of Science and Technology, Meilong Road 130#, Shanghai, 200237, China; [3] ESIQIE, Instituto Politécnico Nacional, Av. Politécnico S/N, Col. Zacatenco, 07738 Mexico D.F., Mexico

年份：2009

卷号：148

期号：1-2

起止页码：70

外文期刊名：Catalysis Today

收录：EI(收录号：20100412663280)

语种：英文

外文关键词：Hexane - Isomerization - Aluminum oxide - Platinum compounds - Zirconia - Catalyst activity - Crystalline materials - Catalyst selectivity - Isomers

摘要：Two Pt/SO42-/ZrO2-Al2O 3 (denoted as PSZA and I-PSZA) catalysts were prepared by using Zr(OH)4 as precursor aged in different conditions, including conventional aging and isopropanol aging. The textural properties, crystalline structure, surface acidity and reduction behaviours of the as PSZA and I-PSZA catalysts were comparatively investigated by N2 adsorption isotherms, XRD, TG-DSC, pyridine-FTIR and H2-TPR techniques. Catalytic tests showed that, using isopropanol aged Zr(OH)4 as ZrO2 precursor, in the n-hexane isomerization reaction, the catalytic activity and stability of the catalyst could be greatly increased and the selectivity of 2,2-DMB was enhanced by more than two times. It was found that isopropanol aging of Zr(OH)4 modified the textural properties and inhibited zirconia phase transformation and stabilized the tetragonal ZrO2 crystalline structure. On the I-PSZA catalyst, more acid centers were formed in comparison with that presented on the PSZA catalyst. Our experimental results show that the surface acidity, textural properties and phase composition of the Pt/SO42-/ZrO2-Al2O 3 catalysts play an important role in n-hexane hydroisomerization. ? 2009 Elsevier B.V. All rights reserved.